/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// net_wipx.c

#include "quakedef.h"
#include "winquake.h"
#include <wsipx.h>
#include "net_wipx.h"

#define MAXHOSTNAMELEN		256

static int net_acceptsocket = -1;		// socket for fielding new connections
static int net_controlsocket;
static struct qsockaddr broadcastaddr;

extern qboolean winsock_initialized;
extern WSADATA  winsockdata;

#define IPXSOCKETS 18
static int ipxsocket[IPXSOCKETS];
static int sequence[IPXSOCKETS];

//=============================================================================

int WIPX_Init (void)
{
    int		i;
    char	buff[MAXHOSTNAMELEN];
    struct qsockaddr addr;
    char	*p;
    int		r;

    if (COM_CheckParm ("-noipx"))
        return -1;

// make sure LoadLibrary has happened successfully
    if (!winsock_lib_initialized)
        return -1;

    if (winsock_initialized == 0)
    {
        r = pWSAStartup (MAKEWORD(1, 1), &winsockdata);

        if (r)
        {
            Con_Printf ("Winsock initialization failed.\n");
            return -1;
        }
    }
    winsock_initialized++;

    for (i = 0; i < IPXSOCKETS; i++)
        ipxsocket[i] = 0;

    // determine my name & address
    if (pgethostname(buff, MAXHOSTNAMELEN) == 0)
    {
        // if the quake hostname isn't set, set it to the machine name
        if (Q_strcmp(hostname.string, "UNNAMED") == 0)
        {
            // see if it's a text IP address (well, close enough)
            for (p = buff; *p; p++)
                if ((*p < '0' || *p > '9') && *p != '.')
                    break;

            // if it is a real name, strip off the domain; we only want the host
            if (*p)
            {
                for (i = 0; i < 15; i++)
                    if (buff[i] == '.')
                        break;
                buff[i] = 0;
            }
            Cvar_Set ("hostname", buff);
        }
    }

    if ((net_controlsocket = WIPX_OpenSocket (0)) == -1)
    {
        Con_Printf("WIPX_Init: Unable to open control socket\n");
        if (--winsock_initialized == 0)
            pWSACleanup ();
        return -1;
    }

    ((struct sockaddr_ipx *)&broadcastaddr)->sa_family = AF_IPX;
    memset(((struct sockaddr_ipx *)&broadcastaddr)->sa_netnum, 0, 4);
    memset(((struct sockaddr_ipx *)&broadcastaddr)->sa_nodenum, 0xff, 6);
    ((struct sockaddr_ipx *)&broadcastaddr)->sa_socket = htons((unsigned short)net_hostport);

    WIPX_GetSocketAddr (net_controlsocket, &addr);
    Q_strcpy(my_ipx_address,  WIPX_AddrToString (&addr));
    p = Q_strrchr (my_ipx_address, ':');
    if (p)
        *p = 0;

    Con_Printf("Winsock IPX Initialized\n");
    ipxAvailable = true;

    return net_controlsocket;
}

//=============================================================================

void WIPX_Shutdown (void)
{
    WIPX_Listen (false);
    WIPX_CloseSocket (net_controlsocket);
    if (--winsock_initialized == 0)
        pWSACleanup ();
}

//=============================================================================

void WIPX_Listen (qboolean state)
{
    // enable listening
    if (state)
    {
        if (net_acceptsocket != -1)
            return;
        if ((net_acceptsocket = WIPX_OpenSocket (net_hostport)) == -1)
            Sys_Error ("WIPX_Listen: Unable to open accept socket\n");
        return;
    }

    // disable listening
    if (net_acceptsocket == -1)
        return;
    WIPX_CloseSocket (net_acceptsocket);
    net_acceptsocket = -1;
}

//=============================================================================

int WIPX_OpenSocket (int port)
{
    int handle;
    int newsocket;
    struct sockaddr_ipx address;
    u_long _true = 1;

    for (handle = 0; handle < IPXSOCKETS; handle++)
        if (ipxsocket[handle] == 0)
            break;
    if (handle == IPXSOCKETS)
        return -1;

    if ((newsocket = psocket (AF_IPX, SOCK_DGRAM, NSPROTO_IPX)) == INVALID_SOCKET)
        return -1;

    if (pioctlsocket (newsocket, FIONBIO, &_true) == -1)
        goto ErrorReturn;

    if (psetsockopt(newsocket, SOL_SOCKET, SO_BROADCAST, (char *)&_true, sizeof(_true)) < 0)
        goto ErrorReturn;

    address.sa_family = AF_IPX;
    memset(address.sa_netnum, 0, 4);
    memset(address.sa_nodenum, 0, 6);;
    address.sa_socket = htons((unsigned short)port);
    if( bind (newsocket, (void *)&address, sizeof(address)) == 0)
    {
        ipxsocket[handle] = newsocket;
        sequence[handle] = 0;
        return handle;
    }

    Sys_Error ("Winsock IPX bind failed\n");
ErrorReturn:
    pclosesocket (newsocket);
    return -1;
}

//=============================================================================

int WIPX_CloseSocket (int handle)
{
    int socket = ipxsocket[handle];
    int ret;

    ret =  pclosesocket (socket);
    ipxsocket[handle] = 0;
    return ret;
}


//=============================================================================

int WIPX_Connect (int handle, struct qsockaddr *addr)
{
    return 0;
}

//=============================================================================

int WIPX_CheckNewConnections (void)
{
    unsigned long	available;

    if (net_acceptsocket == -1)
        return -1;

    if (pioctlsocket (ipxsocket[net_acceptsocket], FIONREAD, &available) == -1)
        Sys_Error ("WIPX: ioctlsocket (FIONREAD) failed\n");
    if (available)
        return net_acceptsocket;
    return -1;
}

//=============================================================================

static byte packetBuffer[NET_DATAGRAMSIZE + 4];

int WIPX_Read (int handle, byte *buf, int len, struct qsockaddr *addr)
{
    int addrlen = sizeof (struct qsockaddr);
    int socket = ipxsocket[handle];
    int ret;

    ret = precvfrom (socket, (char *) packetBuffer, len+4, 0, (struct sockaddr *)addr, &addrlen);

    if (ret == -1)
    {
        int _errno = pWSAGetLastError();

        if (_errno == WSAEWOULDBLOCK || _errno == WSAECONNREFUSED)
        {
            return 0;
        }
    }

    if (ret < 4)
    {
        return 0;
    }

    // remove sequence number, it's only needed for DOS IPX
    ret -= 4;
    memcpy(buf, packetBuffer+4, ret);

    return ret;
}

//=============================================================================

int WIPX_Broadcast (int handle, byte *buf, int len)
{
    return WIPX_Write (handle, buf, len, &broadcastaddr);
}

//=============================================================================

int WIPX_Write (int handle, byte *buf, int len, struct qsockaddr *addr)
{
    int socket = ipxsocket[handle];
    int ret;

    // build packet with sequence number
    *(int *)(&packetBuffer[0]) = sequence[handle];
    sequence[handle]++;
    memcpy(&packetBuffer[4], (const char *) buf, len);
    len += 4;

    ret = psendto (socket, (const char *) packetBuffer, len, 0, (struct sockaddr *)addr, sizeof(struct qsockaddr));

    if (ret == -1)
    {
        if (pWSAGetLastError() == WSAEWOULDBLOCK)
        {
            return 0;
        }
    }
    return ret;
}

//=============================================================================

char *WIPX_AddrToString (struct qsockaddr *addr)
{
    static char buf[28];

    sprintf(buf, "%02x%02x%02x%02x:%02x%02x%02x%02x%02x%02x:%u",
            ((struct sockaddr_ipx *)addr)->sa_netnum[0] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_netnum[1] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_netnum[2] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_netnum[3] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_nodenum[0] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_nodenum[1] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_nodenum[2] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_nodenum[3] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_nodenum[4] & 0xff,
            ((struct sockaddr_ipx *)addr)->sa_nodenum[5] & 0xff,
            ntohs(((struct sockaddr_ipx *)addr)->sa_socket)
           );
    return buf;
}

//=============================================================================

int WIPX_StringToAddr (char *string, struct qsockaddr *addr)
{
    int  val;
    char buf[3];

    buf[2] = 0;
    Q_memset(addr, 0, sizeof(struct qsockaddr));
    addr->sa_family = AF_IPX;

#define DO(src,dest)	\
	buf[0] = string[src];	\
	buf[1] = string[src + 1];	\
	if (sscanf (buf, "%x", &val) != 1)	\
		return -1;	\
	((struct sockaddr_ipx *)addr)->dest = val

    DO(0, sa_netnum[0]);
    DO(2, sa_netnum[1]);
    DO(4, sa_netnum[2]);
    DO(6, sa_netnum[3]);
    DO(9, sa_nodenum[0]);
    DO(11, sa_nodenum[1]);
    DO(13, sa_nodenum[2]);
    DO(15, sa_nodenum[3]);
    DO(17, sa_nodenum[4]);
    DO(19, sa_nodenum[5]);
#undef DO

    sscanf (&string[22], "%u", &val);
    ((struct sockaddr_ipx *)addr)->sa_socket = htons((unsigned short)val);

    return 0;
}

//=============================================================================

int WIPX_GetSocketAddr (int handle, struct qsockaddr *addr)
{
    int socket = ipxsocket[handle];
    int addrlen = sizeof(struct qsockaddr);

    Q_memset(addr, 0, sizeof(struct qsockaddr));

    if(pgetsockname(socket, (struct sockaddr *)addr, &addrlen) != 0)
    {
        int _errno = pWSAGetLastError();
    }
    return 0;
}

//=============================================================================

int WIPX_GetNameFromAddr (struct qsockaddr *addr, char *name)
{
    Q_strcpy(name, WIPX_AddrToString(addr));
    return 0;
}

//=============================================================================

int WIPX_GetAddrFromName(char *name, struct qsockaddr *addr)
{
    int n;
    char buf[32];

    n = Q_strlen(name);

    if (n == 12)
    {
        sprintf(buf, "00000000:%s:%u", name, net_hostport);
        return WIPX_StringToAddr (buf, addr);
    }
    if (n == 21)
    {
        sprintf(buf, "%s:%u", name, net_hostport);
        return WIPX_StringToAddr (buf, addr);
    }
    if (n > 21 && n <= 27)
        return WIPX_StringToAddr (name, addr);

    return -1;
}

//=============================================================================

int WIPX_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
{
    if (addr1->sa_family != addr2->sa_family)
        return -1;

    if (*((struct sockaddr_ipx *)addr1)->sa_netnum && *((struct sockaddr_ipx *)addr2)->sa_netnum)
        if (memcmp(((struct sockaddr_ipx *)addr1)->sa_netnum, ((struct sockaddr_ipx *)addr2)->sa_netnum, 4) != 0)
            return -1;
    if (memcmp(((struct sockaddr_ipx *)addr1)->sa_nodenum, ((struct sockaddr_ipx *)addr2)->sa_nodenum, 6) != 0)
        return -1;

    if (((struct sockaddr_ipx *)addr1)->sa_socket != ((struct sockaddr_ipx *)addr2)->sa_socket)
        return 1;

    return 0;
}

//=============================================================================

int WIPX_GetSocketPort (struct qsockaddr *addr)
{
    return ntohs(((struct sockaddr_ipx *)addr)->sa_socket);
}


int WIPX_SetSocketPort (struct qsockaddr *addr, int port)
{
    ((struct sockaddr_ipx *)addr)->sa_socket = htons((unsigned short)port);
    return 0;
}

//=============================================================================
